Layer 3 interface connected route backup method and system

Abstract

The invention discloses a layer 3 connected route backup method, which comprises: a backup route generation step used for generating a backup route by using a connected route from a node A to a node B; a backup route switching step used for switching service traffic from the node A to the node B onto the backup route for forwarding when the connected route fails; and a new route switching step used for switching the service traffic from the node A to the node B onto a new route for forwarding when the convergence of the route from the node A to the node B is finished to generate the new route. By the method, the rapid switching of layer 3 interface connected route can be realized under the condition of ensuring the invalidation of a layer 3 interface to meet the requirements of a client on protection switching performance. The invention correspondingly provides a layer 3 interface connected route backup system, which comprises a backup route generation module, a backup route switching module and a new route switching module.

Description

technical field [0001] The invention relates to the technical field of IP routing and forwarding of network equipment, in particular to a backup method and system for a three-layer IP interface direct connection route. Background technique [0002] At present, IP technology is more and more widely used in Metro E (Metro Ethernet, Metro Ethernet) / Mobile Backhaul (Mobile Backhaul Network), but there are still many problems to be solved in the actual application process. Fast protection and switching is one of them. In MetroE / Mobile Backhaul, in order to ensure uninterrupted services, the protection switching time is often required to be less than 50ms. That is to say, when the main path fails, it needs to quickly switch to another normal working backup path within 50ms. IP FRR (fast reroute, fast rerouting) technology came into being. The current IP FRR mainly uses routing protocols such as isis (Intermediate System to Intermediate System) / ospf (Open Shortest Path First) / bgp...

AI Technical Summary

Problems solved by technology

[0010] The route convergence time in solution (1) is generally above the second level, which obviously cannot meet customer requirements; IP FRR in solution (2) is currently only applicable to route backups generated by routing protocols such as isis / ospf / bgp. Direct routing is not involved, and in practical applications, PE1 and sGW are usually interconnected by direct routing, so solution (2) is not applicable to this situation

[0011] As can be seen from the above example, there are some problems in the current fast route switchover of the three-layer interface, and the method of route backup needs to be improved.

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